VR: Disable app button when browsing mode is disabled.

Pressing the app button would try to exit WebVR, which would trigger
a non-optional DOFF, which is a really bad user experience. The button
should just be disabled when it can't actually take you back to the
VR browser.

TBR=mthiesse@chromium.org

(cherry picked from commit a0cdfa5)

Bug: 767896
Change-Id: If31a7e8959293efb48618ec40a3cd9e132e92961
Reviewed-on: https://chromium-review.googlesource.com/718986
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#509072}
Reviewed-on: https://chromium-review.googlesource.com/726481
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/branch-heads/3239@{#54}
Cr-Branched-From: adb61db-refs/heads/master@{#508578}

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

@@ -548,7 +548,7 @@ private static void unregisterDaydreamIntent(VrDaydreamApi daydreamApi) {
     /**
      * @return Whether or not VR Shell is currently enabled.
      */
-    private static boolean isVrShellEnabled(int vrSupportLevel) {
+    /* package */ static boolean isVrShellEnabled(int vrSupportLevel) {
         // Only enable ChromeVR (VrShell) on Daydream devices as it currently needs a Daydream
         // controller.
         if (vrSupportLevel != VR_DAYDREAM) return false;
@@ -709,6 +709,11 @@ private void updateVrSupportLevel(Integer vrCorePackageVersion) {
         mVrSupportLevel = supportLevel;
     }
 
+    @VrSupportLevel
+    /* package */ int getVrSupportLevel() {
+        return mVrSupportLevel;
+    }
+
     private void onVrServicesMaybeUpdated() {
         int vrCorePackageVersion = getVrCorePackageVersion();
         if (mCachedVrCorePackageVersion == vrCorePackageVersion) return;

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.java

@@ -328,10 +328,11 @@ public void initializeNative(Tab currentTab, boolean forWebVr,
         float displayHeightMeters = (dm.heightPixels / dm.ydpi) * INCHES_TO_METERS;
 
         mContentVrWindowAndroid = new VrWindowAndroid(mActivity, mContentVirtualDisplay);
+        boolean browsingDisabled = !VrShellDelegate.isVrShellEnabled(mDelegate.getVrSupportLevel());
         mNativeVrShell = nativeInit(mDelegate, mContentVrWindowAndroid.getNativePointer(), forWebVr,
-                webVrAutopresentationExpected, inCct, getGvrApi().getNativeGvrContext(),
-                mReprojectedRendering, displayWidthMeters, displayHeightMeters, dm.widthPixels,
-                dm.heightPixels);
+                webVrAutopresentationExpected, inCct, browsingDisabled,
+                getGvrApi().getNativeGvrContext(), mReprojectedRendering, displayWidthMeters,
+                displayHeightMeters, dm.widthPixels, dm.heightPixels);
 
         reparentAllTabs(mContentVrWindowAndroid);
         swapToTab(currentTab);
@@ -825,9 +826,10 @@ public View getPresentationViewForTesting() {
     }
 
     private native long nativeInit(VrShellDelegate delegate, long nativeWindowAndroid,
-            boolean forWebVR, boolean webVrAutopresentationExpected, boolean inCct, long gvrApi,
-            boolean reprojectedRendering, float displayWidthMeters, float displayHeightMeters,
-            int displayWidthPixels, int displayHeightPixels);
+            boolean forWebVR, boolean webVrAutopresentationExpected, boolean inCct,
+            boolean browsingDisabled, long gvrApi, boolean reprojectedRendering,
+            float displayWidthMeters, float displayHeightMeters, int displayWidthPixels,
+            int displayHeightPixels);
     private native void nativeSetSurface(long nativeVrShell, Surface surface);
     private native void nativeSwapContents(
             long nativeVrShell, Tab tab, AndroidUiGestureTarget androidUiGestureTarget);

chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/WebVrInputTest.java

@@ -35,6 +35,7 @@
 import org.chromium.base.test.util.MinAndroidSdkLevel;
 import org.chromium.base.test.util.Restriction;
 import org.chromium.base.test.util.RetryOnFailure;
+import org.chromium.chrome.browser.ChromeFeatureList;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.vr_shell.util.VrTestRuleUtils;
 import org.chromium.chrome.browser.vr_shell.util.VrTransitionUtils;
@@ -211,6 +212,25 @@ public void testAppButtonExitsPresentation() throws InterruptedException {
                         POLL_TIMEOUT_SHORT_MS, mVrTestFramework.getFirstTabWebContents()));
     }
 
+    /**
+     * Verifies that pressing the Daydream controller's 'app' button does not cause the user to exit
+     * WebVR presentation when VR browsing is disabled.
+     */
+    @Test
+    @MediumTest
+    @Restriction(RESTRICTION_TYPE_VIEWER_DAYDREAM)
+    @CommandLineFlags.Add({"disable-features=" + ChromeFeatureList.VR_SHELL})
+    public void testAppButtonNoopsWhenBrowsingDisabled() throws InterruptedException {
+        mVrTestFramework.loadUrlAndAwaitInitialization(
+                VrTestFramework.getHtmlTestFile("generic_webvr_page"), PAGE_LOAD_TIMEOUT_S);
+        VrTransitionUtils.enterPresentationOrFail(mVrTestFramework.getFirstTabCvc());
+        EmulatedVrController controller = new EmulatedVrController(mVrTestRule.getActivity());
+        controller.pressReleaseAppButton();
+        Assert.assertFalse("App button exited WebVR presentation",
+                VrTestFramework.pollJavaScriptBoolean("!vrDisplay.isPresenting",
+                        POLL_TIMEOUT_SHORT_MS, mVrTestFramework.getFirstTabWebContents()));
+    }
+
     /**
      * Tests that focus loss updates synchronously.
      */

chrome/browser/android/vr_shell/vr_gl_thread.cc

@@ -11,7 +11,6 @@
 #include "chrome/browser/android/vr_shell/vr_shell_gl.h"
 #include "chrome/browser/vr/browser_ui_interface.h"
 #include "chrome/browser/vr/toolbar_state.h"
-#include "chrome/browser/vr/ui.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace vr_shell {
@@ -20,18 +19,14 @@ VrGLThread::VrGLThread(
     const base::WeakPtr<VrShell>& weak_vr_shell,
     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner,
     gvr_context* gvr_api,
-    bool initially_web_vr,
-    bool web_vr_autopresentation_expected,
-    bool in_cct,
+    const vr::UiInitialState& ui_initial_state,
     bool reprojected_rendering,
     bool daydream_support)
     : base::android::JavaHandlerThread("VrShellGL"),
       weak_vr_shell_(weak_vr_shell),
       main_thread_task_runner_(std::move(main_thread_task_runner)),
       gvr_api_(gvr_api),
-      initially_web_vr_(initially_web_vr),
-      web_vr_autopresentation_expected_(web_vr_autopresentation_expected),
-      in_cct_(in_cct),
+      ui_initial_state_(ui_initial_state),
       reprojected_rendering_(reprojected_rendering),
       daydream_support_(daydream_support) {}
 
@@ -44,14 +39,8 @@ base::WeakPtr<VrShellGl> VrGLThread::GetVrShellGl() {
 }
 
 void VrGLThread::Init() {
-  vr::UiInitialState ui_initial_state;
-  ui_initial_state.in_cct = in_cct_;
-  ui_initial_state.in_web_vr = initially_web_vr_;
-  ui_initial_state.web_vr_autopresentation_expected =
-      web_vr_autopresentation_expected_;
-
   vr_shell_gl_ =
-      base::MakeUnique<VrShellGl>(this, this, ui_initial_state, gvr_api_,
+      base::MakeUnique<VrShellGl>(this, this, ui_initial_state_, gvr_api_,
                                   reprojected_rendering_, daydream_support_);
 
   browser_ui_ = vr_shell_gl_->GetBrowserUiWeakPtr();

chrome/browser/android/vr_shell/vr_gl_thread.h

@@ -13,6 +13,7 @@
 #include "base/single_thread_task_runner.h"
 #include "chrome/browser/android/vr_shell/gl_browser_interface.h"
 #include "chrome/browser/vr/browser_ui_interface.h"
+#include "chrome/browser/vr/ui.h"
 #include "chrome/browser/vr/ui_browser_interface.h"
 #include "chrome/browser/vr/ui_interface.h"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
@@ -31,9 +32,7 @@ class VrGLThread : public base::android::JavaHandlerThread,
       const base::WeakPtr<VrShell>& weak_vr_shell,
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner,
       gvr_context* gvr_api,
-      bool initially_web_vr,
-      bool web_vr_autopresentation_expected,
-      bool in_cct,
+      const vr::UiInitialState& ui_initial_state,
       bool reprojected_rendering,
       bool daydream_support);
 
@@ -94,9 +93,7 @@ class VrGLThread : public base::android::JavaHandlerThread,
   // This state is used for initializing vr_shell_gl_.
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   gvr_context* gvr_api_;
-  bool initially_web_vr_;
-  bool web_vr_autopresentation_expected_;
-  bool in_cct_;
+  vr::UiInitialState ui_initial_state_;
   bool reprojected_rendering_;
   bool daydream_support_;
 

chrome/browser/android/vr_shell/vr_shell.cc

@@ -121,9 +121,7 @@ void SetIsInVR(content::WebContents* contents, bool is_in_vr) {
 VrShell::VrShell(JNIEnv* env,
                  const JavaParamRef<jobject>& obj,
                  ui::WindowAndroid* window,
-                 bool for_web_vr,
-                 bool web_vr_autopresentation_expected,
-                 bool in_cct,
+                 const vr::UiInitialState& ui_initial_state,
                  VrShellDelegate* delegate,
                  gvr_context* gvr_api,
                  bool reprojected_rendering,
@@ -147,15 +145,16 @@ VrShell::VrShell(JNIEnv* env,
 
   gl_thread_ = base::MakeUnique<VrGLThread>(
       weak_ptr_factory_.GetWeakPtr(), main_thread_task_runner_, gvr_api,
-      for_web_vr, web_vr_autopresentation_expected, in_cct,
-      reprojected_rendering_, HasDaydreamSupport(env));
+      ui_initial_state, reprojected_rendering_, HasDaydreamSupport(env));
   ui_ = gl_thread_.get();
   toolbar_ = base::MakeUnique<vr::ToolbarHelper>(ui_, this);
 
   gl_thread_->Start();
 
-  if (for_web_vr || web_vr_autopresentation_expected)
-    UMA_HISTOGRAM_BOOLEAN("VRAutopresentedWebVR", !for_web_vr);
+  if (ui_initial_state.in_web_vr ||
+      ui_initial_state.web_vr_autopresentation_expected) {
+    UMA_HISTOGRAM_BOOLEAN("VRAutopresentedWebVR", !ui_initial_state.in_web_vr);
+  }
 }
 
 void VrShell::Destroy(JNIEnv* env, const JavaParamRef<jobject>& obj) {
@@ -868,15 +867,23 @@ jlong Init(JNIEnv* env,
            jboolean for_web_vr,
            jboolean web_vr_autopresentation_expected,
            jboolean in_cct,
+           jboolean browsing_disabled,
            jlong gvr_api,
            jboolean reprojected_rendering,
            jfloat display_width_meters,
            jfloat display_height_meters,
            jint display_width_pixels,
            jint display_pixel_height) {
+  vr::UiInitialState ui_initial_state;
+  ui_initial_state.browsing_disabled = browsing_disabled;
+  ui_initial_state.in_cct = in_cct;
+  ui_initial_state.in_web_vr = for_web_vr;
+  ui_initial_state.web_vr_autopresentation_expected =
+      web_vr_autopresentation_expected;
+
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, reinterpret_cast<ui::WindowAndroid*>(window_android),
-      for_web_vr, web_vr_autopresentation_expected, in_cct,
+      ui_initial_state,
       VrShellDelegate::GetNativeVrShellDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering,
       display_width_meters, display_height_meters, display_width_pixels,

chrome/browser/android/vr_shell/vr_shell.h

@@ -15,6 +15,7 @@
 #include "base/single_thread_task_runner.h"
 #include "chrome/browser/ui/toolbar/chrome_toolbar_model_delegate.h"
 #include "chrome/browser/vr/exit_vr_prompt_choice.h"
+#include "chrome/browser/vr/ui.h"
 #include "chrome/browser/vr/ui_unsupported_mode.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "device/geolocation/public/interfaces/geolocation_config.mojom.h"
@@ -70,9 +71,7 @@ class VrShell : device::GvrGamepadDataProvider,
   VrShell(JNIEnv* env,
           const base::android::JavaParamRef<jobject>& obj,
           ui::WindowAndroid* window,
-          bool for_web_vr,
-          bool web_vr_autopresentation_expected,
-          bool in_cct,
+          const vr::UiInitialState& ui_initial_state,
           VrShellDelegate* delegate,
           gvr_context* gvr_api,
           bool reprojected_rendering,

chrome/browser/vr/ui.h

@@ -30,6 +30,7 @@ struct UiInitialState {
   bool in_cct = false;
   bool in_web_vr = false;
   bool web_vr_autopresentation_expected = false;
+  bool browsing_disabled = false;
 };
 
 // This class manages all GLThread owned objects and GL rendering for VrShell.

chrome/browser/vr/ui_scene_manager.cc

@@ -85,7 +85,8 @@ UiSceneManager::UiSceneManager(UiBrowserInterface* browser,
       started_for_autopresentation_(
           ui_initial_state.web_vr_autopresentation_expected),
       showing_web_vr_splash_screen_(
-          ui_initial_state.web_vr_autopresentation_expected) {
+          ui_initial_state.web_vr_autopresentation_expected),
+      browsing_disabled_(ui_initial_state.browsing_disabled) {
   Create2dBrowsingSubtreeRoots();
   CreateWebVrRoot();
   CreateBackground();
@@ -797,6 +798,10 @@ void UiSceneManager::OnAppButtonClicked() {
   if (started_for_autopresentation_)
     return;
 
+  // If browsing mode is disabled, the app button should no-op.
+  if (browsing_disabled_)
+    return;
+
   // App button click exits the WebVR presentation and fullscreen.
   browser_->ExitPresent();
   browser_->ExitFullscreen();

chrome/browser/vr/ui_scene_manager.h

@@ -194,6 +194,7 @@ class UiSceneManager {
   bool showing_web_vr_splash_screen_ = false;
   bool prompting_to_exit_ = false;
   bool exiting_ = false;
+  bool browsing_disabled_ = false;
 
   bool fullscreen_ = false;
   bool incognito_ = false;